I disagree
I agree that heat tape is always the best way to go, but disagree that heat pads are not a good idea at any time. In my experience and fom what I have learned using a proper herp heating pad with temp control is prefectly safe, and provides the temp you need.
If you have only one or two corns in rubbermaids its sometimes is not cost effective well better I should say not time effective to set up the heat tape and its controls for two corns! this is where heat pads can work perfectly.
The suggestion that heat pads burn rubber is true, if misused, but essentially heat pads and tape are the same thing, only heat tape is a little further away from the plastic. This can easily be accomplished with a heat pad as well by raising the cage with a few bottle caps.
You don't have to buy heat tape for one or two corns is what I am saying. Heat pads used properly DO work fine.
bmm